Support for wire mattresses



June 5, 1 9- c. A. BRANDRETH SUPPORT FOR WIRE IATTRESSES Filed Dec. 9, 1926 2 Sheets-Sheet. 1

[Zarlss fljierf zranJr-efl June 25, 1929. c. A. BRANDRETH SUPPORT FOR WIRE MATTRESSES Filed Dec. 9, 1926 2 Sheets-Sheet 2 [lard/es fl jerz zrznirefl Patented June 25, 1929.

CHARLES ALBERT BRA-NDRETH, F ILFORD, ENGLAND.

V SUPPORT FOR -WIRE MATTRESSES.

Application filed December 9, 1926, Serial No. 153,591, and in Great Britain November 8, 1926.

This invention relates to supports for wire mattresses for re-inforcing the wire fabric of the mattress to prevent sagging, of the kind in which a plurality of coiled springs are mounted on a separate frame suspended from the frame of the mattress, and adapted to support the wire mattress fabric at its weakest point.

The object of the present invention is to construct such a re-inforcing mattress support, primarily with a view to its most economical production, and secondly in such a manner as to enable it to be readily assembled and fitted without the use of any tool whatever, and so that for the purposes of storage and transport this mattress support can be dismantled and its component parts packed in a comparatively small com- )ass.

1 In order to more fully describe the wire mattress support forming the subject of the present invention, reference is had to the accompanying drawings, in which Fig. 1 is a cross-section of a wire mattress showing the support embodying the invention in end elevation in its relative position to the mattress.

Fig. 2 is a plan view of Fig. 1 with the wire fabric of the mattress removed.

Fig. 3 shows an end portion of a longitudinal frame member of the support and the means whereby the said frame is suspended from the mattress frame.

Fig. 4 shows an end portion of a transverse frame member with the means for inter-connecting it to the longitudinal members and the means for supporting the coiled springs.

Fig. 5 shows an assembled corner of the mattresssupport and the means for interengaging the springs with the wire fabric of the mattress.

The frame of the support shown in the drawings consists of two longitudinal (in regard to the mattress) metal bars 1, of upright rectangular cross-section, and three similar transverse bars 2. The bars 1 and 2 are connected by hook-like interengagement of slits or notches 1 and 2 respectively, formed therein from opposite edges of the two bars and of a width corresponding to the thickness of the metal bars 1 and 2. The transverse bars 2 are provided with slits 2 near their ends only, while the longitudinal members have in addition a slit 1 centrally of their length to receive a central transverse bar 2. The ends of the bars beyond the slits may be straight as shown in Figs. 1 to 4, or they may be curled up as shown at 1" and 2" Fig, 5, in order to eliminate shar corners.

The transverse bars 2 are provicfied with a plurality of equidistant stamped out 100 3 2 arranged centrally in alignment along t e broad side of the bars, to constitute sockets for the reception of the axially extending terminals 3 provided at the apex of inverted conically coiled wire springs 3. In order to more securely locate and steady the springs 3 in the sockets 2 the bar 2 is grooved as shown at 2 (Figs. 4, 5) concentrically with the sockets 2 above and below thereof.

The topmost coil of each spring 3 is fitted by clamping with a sheet metal crown 6 having upstanding lugs 6 (Fig. 5), which are adapted to enter, but not to extend and project through the meshes of the wire fabric B of the mat-tress (see Fig. 1) and to prevent displacement of the springs in relation to the mattress, whereby a direct axial thrust is obtained on the springs.

The assembled frame is suspended at its four corners from the longitudinal beams A of the mattress frame by means of flexible rustless metallic straps 4, one end of each of which is bolted to the longitudinal member 1 of the support frame by bolts 5 and nuts 5, while their other ends are adjustably secured on the same bolts 5 by means of wing nuts 5".

In fitting the support to the mattress the straps 4 are so tightened and adjusted that the support is pressed upward a ainst the wire fabric B of the mattress, and t 1e springs 3 are held under tension thereby.

I claim:

1. A detachable metal support for a wire mattress to prevent saggin comprising a frame; devices for suspen ing said frame below the wire mattress; and a multiplicity of inverted frusto-conical coil springs carried by the frame, each spring having clamped to its uppermost coil a sheet metal crown provided with upstanding lugs that extend into but not through the mattress.

2. A detachable metal support for a wire mattress to prevent sagging, comprising a frame embodying connected transverse and longitudinal bars arranged edgewise, certain of said bars being provided each with a plu rality of sockets in the form of open-ended loops that project laterally from the vertical side faces of such bars, said faces being provided With centering grooves above and below said loops; and a multiplicity of in- Verted frusto-conical coil springs, one for each socket, having axially extending lower terminals which are engaged in the sockets and the centering grooves. v

3. A detachable mattress support, according to claim 2, in which each spring has clamped to its uppermost coil a sheet metal crown having upstanding lugs that extend into the mattress.

CHARLES ALBERT BRANDRETH. 

